JP2006155992A - Guide light - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide light satisfying a white color standard in an ordinary time and showing a symbol with good visibility to a pedestrian and the like in the case of a power failure. <P>SOLUTION: This guide light 100 is provided with a fluorescent tube 30 arranged inside a frame 20 having an aperture 21, a panel 10 arranged in the aperture part 21, and the like. The panel 10 comprises a base material 11 having a guide part 11A and light accumulation layers 12, 13, and 14 layered on the base material 11 side from the fluorescent tube 30 side. In the light accumulation layers 12, 13, and 14 each containing a phosphor 15 having an afterglow property, a white coloring material 16, and a binder 17 and having layer thickness 45-50 μm, a mixture ratio of the white coloring material 16 obtained by dividing mass of the white coloring material 16 by mass of the phosphor 15 ranges from 1.33 to 3.56% in the light accumulation layer 14, from 3.18 to 5.91% in the light accumulation layer 13, and from 5.58 to 8.37% in the light accumulation layer 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a guide light that allows a pedestrian or the like to visually recognize an evacuation place or an evacuation route.

Conventionally, this kind of guide light is composed of a frame in which a fluorescent tube is arranged, a milky white panel provided in an opening of the frame, a power supply device for supplying power to the fluorescent tube, etc. In preparation for a disaster, a symbol composed of characters and symbols indicating the evacuation place and evacuation route is provided.
When a power failure occurs at the time of a disaster, the guide light allows a pedestrian or the like to visually recognize an evacuation place or an evacuation route by causing a fluorescent tube to emit light from a storage battery included in the power supply device. For this reason, the visibility of the symbol is very important in preparing for a disaster.
However, if the storage battery is used for a long time in a state where maintenance or the like has been neglected, there is a possibility that the fluorescent tube can emit light only for a short time at the time of a disaster, and a pedestrian or the like cannot visually recognize the symbol.

  On the other hand, there is known a pigment that has a property of emitting phosphorescence (afterglow) for a relatively long time in a dark place when irradiated with sunlight or artificial illumination light, and this phenomenon can be repeated any number of times. This pigment is called a phosphorescent pigment because it absorbs light (hereinafter referred to as phosphorescence) and emits light in a dark place like charging and discharging of a storage battery.

Patent Document 1 is composed of a phosphor layer containing a phosphor (phosphorescent pigment or the like) and a binder, and a colored layer containing a colorant, a phosphor and a binder. An afterglow complex that can be colored in gold, silver metal color or black and has high emission luminance is disclosed.
The afterglow complex of Patent Document 1 can reflect light having various colors on the observation side when the light source and the observer are located on the same side of the afterglow complex.

When the afterglow complex of Patent Document 1 is applied to a guide light, the guide light is a so-called transmission type, and normally, a light source arranged inside the frame is lit, and the light is It will pass through the afterglow complex. For this reason, the transmitted light that has passed through the afterglow complex appears to be a color (yellow) when the phosphorescent pigment is not emitting light (during phosphorescence).
However, the guide light needs to be visually confirmed by the observer when the light source is turned on by the Fire Service Act, and the color of the symbol must be white.

In order to make this transmitted light white, it is conceivable to add a white colorant to the colored layer. However, since the white colorant has a light-shielding property, the phosphorescent pigment may not accumulate.

Japanese Patent No. 3127198

  An object of the present invention is to provide a guide light that satisfies a white standard and can show a symbol to a pedestrian or the like with high visibility during a power failure.

The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to the Example of this invention is attached | subjected and demonstrated, it is not limited to this.
The invention of claim 1 is provided in the opening (21) and the base (20) having the light source (30) and the opening (21) in which the light source (30) is arranged. A transparent or translucent substrate layer (11), a light emitter (15) disposed on the light source (30) side of the substrate layer (11) and having afterglow properties, a white colorant (16), A binder (17), and the mixing ratio of the white colorant (16) obtained by dividing the mass of the white colorant (16) by the mass of the light emitter (15) is the substrate layer (11). It is a guide light provided with a phosphorescent layer that is larger toward the side.

  A second aspect of the present invention is the guide lamp according to the first aspect, wherein the phosphorescent layer has a laminated structure in which a plurality of layers having different blending ratios of the white colorant (16) are laminated. It is a guide light.

  The invention according to claim 3 is the guide light according to claim 2, wherein the phosphorescent layer is disposed on the light source (30) side, and the blending ratio is 1.33 to 3.56%. (14), the second phosphorescent layer (13) disposed on the substrate layer (11) side of the first phosphorescent layer (14) and having the blending ratio of 3.18 to 5.91%, A third phosphorescent layer (12) disposed on the substrate layer (11) side of the two phosphorescent layers (13) and having a blending ratio of 5.58 to 8.37%. It is a light.

  According to a fourth aspect of the present invention, in the guide lamp according to the third aspect, each of the first luminous layer (14), the second luminous layer (13), and the third luminous layer (12) has a thickness of 45. It is a guide light characterized by being -50 micrometers.

(1) The guide lamp of the present invention is disposed on the light source side of the substrate layer, and has a phosphorescent layer in which the compounding ratio of the white colorant is larger toward the substrate layer side. Therefore, the phosphorescent layer is white colorant on the substrate layer side. Even if the phosphorescence on the substrate layer side is somewhat damaged by the white colorant, it appears white on the observation side when the light source is turned on, and the white standard can be satisfied.
In addition, the phosphorescent layer contains a large amount of light emitters on the light source side, and the light from the light source is sufficiently absorbed by the light emitters, so that the light accumulation is not impaired. For this reason, the guide light can show a desired symbol to a pedestrian or the like with good visibility because the light emitter has sufficient light emission luminance at the time of a power failure.

(2) Since the phosphorescent layer has a laminated structure in which a plurality of layers having different blending ratios of the white colorant are laminated, a phosphorescent layer having a larger blending ratio of the white colorant toward the substrate layer side can be formed.

(3) Since the first phosphorescent layer, the second phosphorescent layer, and the third phosphorescent layer each have a thickness of 45 to 50 μm, the reflection of the light source is not normally observed and the uniformity of brightness is impaired. In the event of a power failure, the stored light of the illuminant is not impaired, and a desired symbol can be shown to a pedestrian or the like with good visibility.

  An object of the present invention is to provide an afterglow illuminant that is disposed on the light source side of a substrate layer for the purpose of satisfying a white standard and displaying a symbol to a pedestrian or the like with high visibility during a power failure. This is achieved by including a phosphorescent layer that includes a colorant and a binder, and the white colorant compounding ratio obtained by dividing the mass of the white colorant by the mass of the light emitter is larger toward the substrate layer side.

Hereinafter, the present invention will be described in more detail with reference to the drawings and the like.
FIG. 1 is a diagram illustrating a guide light 100 according to an embodiment of the present invention. 1A is a schematic cross-sectional view of the guide light 100, and FIG. 1B is a front view of the guide light 100.
The guide light 100 is, for example, an evacuation guide light that is installed in a subway premises and allows a pedestrian or the like to visually recognize the guide part 11A such as an evacuation place or an evacuation route. Are provided with a fluorescent tube 30 and a panel 10 provided in the opening 21.
The fluorescent tube 30 irradiates the panel 10 with light L1 that is excitation light when electric power is supplied from a power supply device (not shown). The light L1 is preferable because it has a function of causing the fluorescent material to shine, and is easily accumulated in the phosphor 15 having afterglow included in the panel 10 described later (see FIG. 2). The light when the phosphor 15 absorbs and accumulates light and then gradually emits and emits light in the dark is called phosphorescence.

  As shown in FIG. 1A, the panel 10 is provided on the observation side (the upper side in the figure), and is laminated on the transparent base material 11 not containing the UV-cutting agent from the base material 11 side to the fluorescent tube 30 side. Light storage layers 12, 13, and 14.

FIG. 2 is a schematic cross-sectional view showing the laminated structure of the panel 10.
The base member 11 has an induction portion 11A (see FIG. 1B) formed on the observation side. The base material 11 is not limited to being transparent and is translucent so long as it does not contain a UV-cutting agent so that the light L1 of the fluorescent tube 30 and the phosphorescence of the phosphor 15 can be easily transmitted to the observation side. Also good. Moreover, as the base material 11, you may use what consists of appropriate materials, such as glass and a polyethylene terephthalate (henceforth PET).

  The guide unit 11A has a symbol composed of characters and symbols indicating an evacuation place and an evacuation route in preparation for a disaster, and this symbol is printed directly on the substrate 11 in a desired color (for example, green). Has been. Note that the color of the portion other than the symbol (that is, the ground portion) is the same as the color of the observation light L2 that passes through the panel 10 when the base material 11 is transparent.

  The phosphorescent layers 12, 13, and 14 include a phosphor 15, a white colorant 16, and a binder 17, and are obtained by dividing the weight of the white colorant 16 by the weight of the phosphor 15. The weight% of the agent 16 (hereinafter referred to as the blending ratio of the white colorant 16) is larger toward the substrate 11 side. That is, the blending ratio of the white colorant 16 increases in the order of the phosphorescent layer 14, the phosphorescent layer 13, and the phosphorescent layer 12, and the blending ratios of the respective white colorants 16 are different.

The phosphorescent layer 14 preferably has a white colorant 16 blending ratio of 1.33 to 3.56%, more preferably 2.22%.
The phosphorescent layer 13 preferably has a white colorant 16 blending ratio of 3.18 to 5.91%, more preferably 4.55%.
In the phosphorescent layer 12, the blending ratio of the white colorant 16 is preferably 5.58 to 8.37%, and more preferably 6.98%.
Moreover, it is preferable that the layer thickness of the luminous layers 12, 13, and 14 is 45-50 micrometers.

Here, functions required for the guide light 100 will be described.
The guide light 100 allows a pedestrian or the like to visually recognize the guide portion 11A by the observation light L2 obtained by transmitting the light L1 of the fluorescent tube 30 through the panel 10 when the fluorescent tube 30 is turned on (that is, during normal operation). . At this time, the guide light 100 is required to be visually confirmed and appear white.

  Further, the guide light 100 is required to show the guide part 11A with good visibility to a pedestrian or the like by the observation light L by phosphorescence of the phosphor 15 at the time of a power failure due to a disaster or the like (see FIG. 3). The emission brightness of phosphorescence must be high to some extent. For this reason, the guide lamp 100 needs to store enough light from the light L of the fluorescent tube 30 at the normal time.

Here, the relationship between the function of the guide lamp 100 and the blending ratio and the layer thickness of the white colorant 16 will be schematically described.
The phosphorescent layers 12, 13, and 14 have a large blending ratio of the white colorant 16 and the degree of phosphorescence of the phosphor 15 tends to decrease as the layer thickness increases.
The reason for this is that since the white colorant 16 contains titanium oxide and the like, the light L1 from the fluorescent tube 30 is blocked, so if the blending ratio of the white colorant 16 becomes too large, the phosphor 15 It is conceivable that sufficient light L1 is not absorbed and the light is not sufficiently stored. In this case, the guide light 100 cannot show the guide part 11A to a pedestrian or the like with good visibility during a power failure such as a disaster.

On the other hand, in the phosphorescent layers 12, 13, and 14, when the blending ratio of the white colorant 16 becomes too small, the color of the observation light L2 looks yellow instead of white. In this case, the guide light 100 does not satisfy the white color standard.
Further, when the layer thickness of the phosphorescent layers 12, 13, and 14 becomes too thin, the fluorescent tube 30 is reflected. In this case, in the guide light 100, the brightness uniformity of the guide portion 11A is impaired at the normal time.
Therefore, in the guide lamp 100, the phosphorescent layers 12, 13, and 14 are colored white in consideration of the degree of phosphorescence of the phosphor 15, the color of the observation light L2, and the uniformity and visibility of the brightness of the guiding portion 11A. It is necessary to set the compounding ratio of the agent 16 and the layer thickness.

The phosphor 15 is a substance that generates phosphorescence, and may be an appropriate substance such as a white phosphorescent pigment. The phosphor 15 has a particle size of 15 to 25 μm. The white phosphorescent pigment is preferably a phosphorescent pigment that does not contain a radioactive substance and contains an aluminate chloride compound as a main component and a rare earth element as an activator, from the viewpoint that the use is not limited and phosphorescence brightness is high. .
This white phosphorescent pigment is preferably, for example, N-Luminous Luminova (Luminova: registered trademark of Nemoto Special Chemical Co., Ltd.) known as a high-intensity long afterglow phosphor, and specifically, Nemoto Special Chemical Co., Ltd. Made of WA300M is more preferable.

The white colorant 16 is, for example, a colorant mainly composed of titanium oxide and has a light shielding property, but can make the observation light L2 appear white. The white colorant 16 has a particle size of 15 to 25 μm.
This white colorant 16 can be used as it is for ordinary inks and paints, and may be an organic or inorganic dye or pigment, but is preferably a fluorescent dye having no afterglow, Specifically, KG manufactured by Hakugen Co., Ltd. or white fluorescent pigment manufactured by Sinloihi Co., Ltd. is more preferable.

  The binder 17 is not particularly limited as long as it can form a layer together with the phosphor 15 and the white colorant 16, and is preferably highly transparent from the viewpoint of obtaining high emission luminance. Examples of the resin as the main component of the binder 17 include acrylic resins, alkyd resins, epoxy resins, urethane resins, acrylic silicon resins, silicon resins, fluorine resins, melamine resins, and the like (for example, vinyl, vinyl chloride, polyester, polycarbonate, Polyolefin, aminoalkyd, styrene), and urethane type is more preferable.

  In addition, the panel 10 has a phosphorescent layer 12 on the base material 11 by screen printing, which is commonly used for forming a coating film, a coating film, and the like, from the viewpoint of forming a relatively thick layer in order to obtain high emission luminance. It is manufactured by forming 13 and 14.

  The screen mesh used for screen printing has a layer thickness (for example, 45 to 50 μm) that does not impair the phosphorescence of the phosphor 15 and does not impair the uniformity of the brightness of the guiding portion 11A. , 13, and 14 are not particularly limited, it is preferable to use a 70-90 mesh screen, and more specifically, EX31-100 / 80PW manufactured by NBC Corporation having 80 mesh is more preferable.

Next, the light emission process at the normal time of the guide light 100 will be described. In the guide lamp 100, the observation light L2 normally appears white as described above, sufficient phosphorescence is performed on the phosphor 15, and the brightness uniformity of the guide portion 11A is not impaired. That is required.
First, the fluorescent tube 30 irradiates the light L1 at the normal time.
The phosphorescent layer 14 is arranged closest to the fluorescent tube 30, and the blending ratio of the white colorant 16 is 1.33 to 3.56%, and the blending ratio of the white colorant 16 of the phosphorescent layers 12 and 13 is Is also small. For this reason, in the phosphorescent layer 14, the light L1 is sufficiently absorbed by the phosphor 15, and sufficient phosphorescence is performed.

Further, the light L1 that has passed through the phosphorescent layer 14 reaches the phosphorescent layer 13, and a part of the light L1 is accumulated in the phosphor 15 of the phosphorescent layer 13. Here, the phosphorescent layer 13 has a blending ratio of the white colorant 16 of 3.18 to 5.91%, which is larger than a blending ratio of the white colorant 16 of the phosphorescent layer 14.
For this reason, the phosphorescent layer 13 can reduce the degree of phosphorescence as compared with the phosphorescent layer 14, but the light L1 that passes through the phosphorescent layer 13 can be made closer to yellow from white.

Furthermore, the light L 1 that has passed through the phosphorescent layer 13 reaches the phosphorescent layer 12, and a part of the light L1 is accumulated in the phosphor 15 of the phosphorescent layer 12. Here, the phosphorescent layer 12 has a blending ratio of the white colorant 16 of 5.58 to 8.37%, which is larger than the blending ratio of the white colorant 16 of the phosphorescent layer 13.
For this reason, the light storage layer 12 can reduce the degree of light storage compared to the light storage layer 13, but the light L1 that passes through the light storage layer 12 can be white.
And the light L which passed the luminous layer 14,13,12 passes the base material 11, turns into the observation light L2 which permeate | transmits the panel 10, it confirms visually, it looks white, and it may satisfy | fill white standard. it can.

As described above, according to the guide lamp 100, the phosphorescent layers 12, 13, and 14 having different mixing ratios of the white colorant 16 are laminated, and the substrate 11 side contains a larger amount of the white colorant 16, Even if a part of the light L of the fluorescent tube 30 is shielded by the white colorant 16 and the light storage of the light storage layer 12 on the base 11 side is somewhat impaired, it looks white on the observation side and satisfies the white standard. be able to.
Further, since the phosphorescent layers 12, 13, and 14 contain more phosphor 15 toward the fluorescent tube 30 side, even if the phosphorescent layer 12 on the base material 11 side is somewhat damaged, the fluorescent tube 30 The light L1 of the fluorescent tube 30 is sufficiently stored in the phosphor 15 of the side storage layer 14. For this reason, the guide lamp 100 can sufficiently store the phosphor 15 in the phosphorescent layers 12, 13, and 14 as a whole.

  Further, the phosphorescent layers 12, 13, and 14 have a layer thickness of 45 to 50 μm, and the total thickness of the three layers is 135 μm or more, so that the fluorescent tube 30 is not reflected normally, The uniformity of the brightness of the guiding portion 11A is not impaired, and furthermore, the layer thickness of the entire three layers is 150 μm or less, so that the light can be stored.

Next, a case where a power failure occurs due to a disaster or the like will be described.
FIG. 3 is a diagram illustrating the guide light 100 when a power failure occurs. In addition, the guide light 100 is required to show the guide part 11A to a pedestrian or the like with good visibility by the phosphorescence of the phosphor 15 at the time of a power failure.
In the guide light 100, for example, when a power failure occurs in a subway premises, the fluorescent tube 30 is turned off, and the observation light L2 transmitted through the panel 10 cannot be obtained.
However, in the guide lamp 100, the light L1 of the fluorescent tube 30 is sufficiently stored in the phosphor 15 of the phosphorescent layer 14 on the fluorescent tube 30 side at normal times, so that the emission luminance is higher on the fluorescent tube side 30 side. Phosphorescence can be obtained.
Furthermore, phosphorescence of the phosphorescent layer 14 promotes phosphorescence and light emission of the phosphor 15 of the phosphorescent layers 12 and 13 by passing through the phosphorescent layers 12 and 13. And the phosphorescence by the phosphor 15 of the phosphorescent layers 12, 13, 14 overlaps each other and has a sufficient luminance, and passes through the base material 11 to become observation light L.

  In this way, the guide light 100 is installed in a subway premises and the like, and even when a power failure occurs during a disaster, the observation light L having sufficient luminance can be obtained. Can be shown with good visibility, and the damage at the time of disaster can be prevented from expanding.

(Experimental example)
Hereinafter, the present invention will be described in more detail with specific examples.
The present inventor has a function required for the guide lamp 100 during normal operation (the observation light L2 appears white, sufficient phosphorescence is performed on the phosphor 15, and the brightness uniformity of the guide portion 11A is impaired. In order to obtain the functions required at the time of a power outage (to show the guiding part 11A to a pedestrian or the like with the phosphorescence of the phosphor 15 with high visibility), an earnest study was conducted.
(Experimental Examples 1-8)
Table 1 shows Experimental Examples 1 to 8 in the case where one phosphorescent layer is disposed on the fluorescent tube 30 side of the base material 11, and evaluates the degree of phosphorescence and the color. In each experimental example shown below, the white phosphorescent pigment is WA300M manufactured by Nemoto Special Chemical Co., Ltd., the white colorant is KG manufactured by Hakumoto Co., Ltd., the binder is a urethane binder, and the screen is NBC stock. A company-made EX screen was used. Furthermore, the base material was made of PET having a thickness of 2.0 mm made of TAKIRON Co., Ltd. UV-cutting agent-free PET.
In Experimental Example 1, 230 g of white phosphorescent pigment, 100 g of binder, and 69 g of white colorant were sufficiently stirred and mixed to form a phosphorescent layer forming ink. This ink for forming a phosphorescent layer was screen printed using a 100 mesh screen to form a phosphorescent layer.
In the phosphorescent layer of Experimental Example 1, the mixing ratio of the white colorant, which is the weight percentage of the white colorant obtained by dividing the weight of the white colorant by the mass of the white phosphorescent pigment, is 30%. Although the color was “white”, no phosphorescence was performed and the degree of phosphorescence was “x”. For this reason, the guide light of Experimental Example 1 cannot make the pedestrian or the like visually recognize the guide portion 11A during a power failure.
In Experimental Examples 2 to 4, the mixing ratio of the white colorant was set to 20%, 15%, and 10%, respectively, and the degree of phosphorescence and the color were evaluated in the same manner as in Experimental Example 1, but the results were the same as in Experimental Example 1. Met.

In Experimental Examples 5 and 6, the mixing ratio of the white colorant was set to 8% and 6%, respectively, and as a result, the color was “white”, the phosphorescence was slightly performed, and the degree of phosphorescence was “Δ”. . For this reason, the guide lamps of Experimental Examples 5 and 6 are not preferable because the emission brightness of phosphorescence during a power failure is small.
In Experimental Examples 7 and 8, the mixing ratio of the white colorant was 4% and 2%, respectively, and as a result, the phosphorescence was sufficiently performed and the degree of phosphorescence was “◯”, but the color was “yellow”. It was. For this reason, the guide lights of Experimental Examples 7 and 8 appear yellow at normal times and do not satisfy the white standard.

  That is, according to Experimental Examples 1 to 8, the degree of phosphorescence can be improved by reducing the blending ratio of the white colorant, but on the other hand, the color looks yellow and the phosphorescence is accumulated in one layer. It was found that it was difficult to obtain a good evaluation for both the degree and the color.

(Experimental Examples 9-12)
Next, a phosphorescent layer having a three-layer laminated structure was formed instead of one layer, and the degree of phosphorescence and the color were evaluated.
Table 2 shows Experimental Examples 9 to 12 in which the phosphorescent layers of Experimental Examples 1 to 4 are stacked as the luminous layers 12, 13, and 14, respectively.
Similar to the evaluation results of Experimental Examples 1 to 4, Experimental Example 9 to 12 have a color of “white”, but no phosphor storage is performed and the degree of phosphor storage is “x”, which indicates that it cannot be used as a guide light. It was.
That is, according to Experimental Examples 9 to 12, even if the phosphorescent layer has a laminated structure, it is difficult to obtain a good evaluation for both the degree of phosphorescence and the color if the mixing ratio of the white colorant is the same. I understood.

(Experimental Examples 13 to 19)
Therefore, the blending ratio of the white colorant 16 in the phosphorescent layers 12, 13, and 14 was increased toward the substrate 11 side and decreased toward the fluorescent tube 30 side to evaluate the degree of phosphorescence and the color.
Table 3 shows Experimental Examples 13 to 19 that were adjusted so that the blending ratio of the white colorant 16 gradually increased in the order of the phosphorescent layer 14, phosphorescent layer 13, and phosphorescent layer 12.
In Experimental Example 13, the phosphorescent layer 14 is 2.22%, the phosphorescent layer 13 is 4.55%, and the phosphorescent layer 12 is 6.98%. As a result, the phosphorescence is sufficiently performed and the degree of phosphorescence is obtained. Was “◎” and the color was “white”.
As shown in Table 3, Experimental Examples 14 to 17 are adjusted so that the blending ratio of the white colorant 16 increases in the order of the phosphorescent layer 14, the phosphorescent layer 13, and the phosphorescent layer 12. 1.33 to 3.56%, phosphorescent layer 13 to 3.18 to 5.91%, and phosphorescent layer 12 to 5.58 to 8.37%.
Experimental Examples 14 to 17 obtained the same results as Experimental Example 13 except that the degree of phosphorescence was “◯”.

In Experimental Example 18, the phosphorescent layer 14 was 4.44%, the phosphorescent layer 13 was 6.82%, and the phosphorescent layer 12 was 9.3%. As a result, the color was “white”. No phosphorescence was performed, and the degree of phosphorescence was “x”.
The reason why the phosphorescence was not performed in Experimental Example 18 is that the blending ratio of the white colorant 16 in the phosphor layer 12, 13, 14 was too large. For example, the phosphor layers 12, 13, 14 were laminated. Even in this case, it was found that there is an upper limit to the blending ratio of the white colorant 16.
In Experimental Example 19, the phosphorescent layer 14 was 0.8%, the phosphorescent layer 13 was 2.27%, and the phosphorescent layer 12 was 4.65%. As a result, the phosphorescence was performed and the degree of phosphorescence was “ The color was “yellow”.
The reason why the color appeared to be yellow in Experimental Example 18 is that the mixing ratio of the white colorant 16 in the phosphorescent layers 12, 13, and 14 is considered to be too small, and the mixing ratio of the white colorant 16 has a lower limit. I understood.

  That is, in Experimental Examples 13 to 19, the mixing ratio of the white colorant 16 is most preferable in Experimental Example 13, and the mixing ratio of the white colorant 16 in Experimental Examples 18 and 19 is outside the predetermined range, which is not preferable. I understood it.

  However, when the guide lamps of Experimental Examples 13 to 19 were used in normal times and visually confirmed, the fluorescent tube 30 was reflected, and the uniformity of the brightness of the guide portion 11A was impaired and used as a guide light. I found it impossible. The cause is considered to be the layer thickness of the phosphorescent layers 12, 13, and 14. When screen printing was performed using a 100 mesh screen, the layer thickness was about 40 μm.

(Experimental Examples 20 to 26)
For this reason, the layer thickness of the luminous layers 12, 13, and 14 is adjusted to improve the uniformity.
Table 4 shows Experimental Examples 20 to 26 in which the screen mesh used for screen printing was changed from 100 to 60 and the layer thickness was increased with respect to Experimental Examples 13 to 19. When screen printing was performed using a 60 mesh screen, the layer thickness was about 60 μm.
In Experimental Examples 20 to 24, compared with Experimental Examples 13 to 17, the fluorescent tube 30 was not reflected due to the increased layer thickness, and the uniformity was “◯”. It was not performed and the degree of phosphorescence was “x”.
The experimental example 25 is different from the experimental example 18 in that the uniformity is “◯”.
In Experimental Example 26, the uniformity was “◯” compared to Experimental Example 19, while the luminous intensity was “X”.
That is, in Experimental Examples 20 to 26, it was found that the layer thickness affects not only the uniformity but also the degree of light storage. For this reason, the layer thicknesses of the phosphorescent layers 12, 13, and 14 need to be thin because phosphorescence is performed, and on the other hand, it is necessary to increase the thickness so that the uniformity is not impaired.

(Experimental examples 27 to 33)
Next, the layer thicknesses of the phosphorescent layers 12, 13, and 14 were adjusted in consideration of not only the uniformity but also the degree of phosphorescence.
Table 5 shows Experimental Examples 27 to 33 in which the screen mesh used for screen printing was changed from 60 to 70 and the layer thickness was reduced with respect to Experimental Examples 20 to 26. When screen printing was performed using a 70 mesh screen, the layer thickness was about 50 μm.
In Experimental Example 27, as compared with Experimental Example 20, the layer thickness was reduced, so that phosphorescence was performed and “◯” was obtained.
In the experimental examples 28 to 31, compared with the experimental examples 21 to 24, the light storage was performed to some extent, and the degree of light storage was “Δ”. Note that the degree of phosphorescence “Δ” indicates that phosphorescence is not sufficient, but the phosphorescent emission luminance is such that the pedestrian 11A can visually recognize the guiding portion 11A.

As described above, in Experimental Example 32, since the blending ratio of the white colorant 16 was too large, only the same results as in Experimental Example 25 were obtained even if the layer thickness was reduced.
In Experimental Example 33, since the blending ratio of the white colorant 16 is too small, even if the layer thickness is reduced, compared with Experimental Example 26, only a little light is accumulated and the degree of light accumulation is only “Δ”. The color was “yellow”.
That is, in the experimental examples 27 to 33, the guide lights of the experimental examples 27 to 31 have a luminous intensity of “Δ” or more, a color of “white”, and a uniformity of “◯”. Over time, it turned out to have the required functionality.
However, in Experimental Examples 28 to 31, since the degree of phosphorescence is “Δ”, it is considered that the layer thickness needs to be further reduced.

(Experimental Examples 34 to 40)
Table 6 shows Experimental Examples 34 to 40 in which the layer thickness is further reduced by changing the mesh of the screen used for screen printing from 70 to 80 with respect to Experimental Examples 27 to 33. When screen printing was performed using an 80 mesh screen, the layer thickness was about 48 μm.
In Experimental Example 34, compared with Experimental Example 20, the layer thickness was reduced, so that the light was sufficiently stored and the degree of light storage was “◎”.

In Experimental Examples 35 to 38, light accumulation was performed and the degree of light accumulation was “◯” compared to Experimental Examples 28 to 31.
In Experimental Example 39, since the blending ratio of the white colorant 16 was too large, only the same results as in Experimental Example 32 were obtained even if the layer thickness was reduced.
In Experimental Example 40, since the blending ratio of the white colorant 16 is too small, even if the layer thickness is reduced, compared with Experimental Example 33, phosphorescence is performed and the degree of phosphorescence is only “◯”. The color was “yellow”.
That is, in the experimental examples 34 to 40, the guide lights of the experimental examples 34 to 38 have a luminous intensity of “◯” or more, a color of “white”, and a uniformity of “◯”. Over time, it turned out to have the required functionality. Particularly, in Experimental Example 34, the degree of phosphorescence was “◎”, which was optimal as a guide light.

(Experimental examples 41 to 47)
Then, the layer thickness was further reduced to confirm whether a more preferable result could be obtained. However, when the screen mesh is 100, it is known from Experimental Examples 13 to 19 that the uniformity is impaired and the layer thickness becomes too thin, which is not preferable.
Table 7 shows Experimental Examples 41 to 47 in which the layer thickness is further reduced by changing the screen mesh used for screen printing from 80 to 90 with respect to Experimental Examples 33 to 40. When screen printing was performed using a 90 mesh screen, the layer thickness was about 45 μm.
In Experimental Examples 41 to 47, the uniformity was “Δ” as compared with Experimental Examples 34 to 40. The uniformity “Δ” indicates that the brightness uniformity of the guiding portion is somewhat impaired at normal times, but the fluorescent tube 30 is not reflected.
That is, in Experimental Examples 41 to 47, the guide lights of Experimental Examples 41 to 45 have a luminous intensity of “◯” or more, a color of “white”, and uniformity of “△”. , Found to have the required function.

FIG. 4 is a graph comparing the suitability of guide lights according to each experimental example. The horizontal axis is the phosphorescent layers 12, 13, and 14, and the vertical axis is the mixing ratio of the respective white colorants 16.
This graph shows experimental examples 9 to 12 in which the blending ratio of the white colorant 16 in the phosphorescent layers 12, 13, and 14 is not changed, and the blending ratio of the white colorant 16 is within a predetermined range, and the white colorant Experimental examples 27 to 33, 34 to 40, and 41 to 47 in which the phosphorescent layers 12, 13, and 14 were laminated so that the blending ratio of 16 was increased toward the substrate 11 side were shown. In the graph, “◎” is optimal, “◯” is good, “Δ” is within the practical range, and “×” is unusable.
Examples 9 to 12, 32, 33, 39, 40, 46, and 47 were unusable as guide lights and were “x”.
Experimental Examples 28-31 and 42-45 were in the practical range as guide lights and were “Δ”.
Experimental Examples 27, 35 to 38, and 41 were good as guide lights and were “◯”.
Experimental example 34 was optimal as a guide light, and was “◎”.

  Therefore, in the guide lamp 100, the phosphorescent layer 14 in which the blending ratio of the white colorant 16 is larger toward the base material 11 and the blending ratio of the white colorant 16 is 1.33 to 3.56%; The phosphorescent layer 13 having a blending ratio of 3.18 to 5.91% and the phosphorescent layer 12 having a blending ratio of the white colorant 16 of 5.58 to 8.37% from the fluorescent tube 30 side to the base material 11 It is preferable that the layer thicknesses of the phosphorescent layers 12, 13, and 14 are 45 to 50 μm.

(Modification)
The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.
(1) In each experimental example described above, the white colorant is KG manufactured by Shiramoto Co., Ltd., but is not limited to this. Aurorainbow (Nemoto Special Chemical Co., Ltd.) capable of emitting white light by irradiating ultraviolet rays. (Registered trademark of Co., Ltd.) may be used, and by making the blending ratio and the layer thickness of the white colorant 16 of the phosphorescent layers 12, 13, and 14 within the above-mentioned suitable ranges, an evaluation close to that when using KG is achieved. Obtainable.
(2) Although the fluorescent tube 30 is used as the light source of the guide lamp 100, an appropriate light emitting means such as an LED may be used as long as the phosphor 15 is irradiated with excitation light. In particular, since the LED has a shorter response time, lower power consumption, and longer life compared to ordinary fluorescent lamps, the frequency of maintenance of the guide light 100 can be reduced, and the directivity is also wide. The number of fluorescent tubes 30 arranged in the frame 20 can be reduced.

It is a figure which shows the guide light 100 by the Example of this invention. 2 is a schematic cross-sectional view showing a laminated structure of panel 10. FIG. It is a figure which shows the guide light 100 when a power failure generate | occur | produces. It is the graph which compared the suitability of the guide light by each experimental example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Panel 11 Base material 11A Guide part 12, 13, 14 Phosphorescent layer 15 Phosphor 16 White colorant 17 Binder 20 Frame 21 Opening part 30 Fluorescent tube 100 Guide lamp L1 Excitation light L2, L Observation light

Claims (4)

A light source;
A base having an opening, in which the light source is disposed;
A transparent or translucent substrate layer provided in the opening;
The white color obtained by dividing the mass of the white colorant by the mass of the illuminant, which is disposed on the light source side of the substrate layer, includes a phosphor having afterglow, a white colorant, and a binder. A phosphorescent layer in which the blending ratio of the colorant is larger toward the substrate layer side;
Guide light with. The guide light according to claim 1,
The phosphorescent layer has a laminated structure in which a plurality of layers having different mixing ratios of the white colorant are laminated;
A guide light characterized by. The guide light according to claim 2,
The luminous layer is
A first phosphorescent layer disposed on the light source side and having a blending ratio of 1.33 to 3.56%;
A second phosphorescent layer disposed on the substrate layer side of the first phosphorescent layer and having a blending ratio of 3.18 to 5.91%;
A third phosphorescent layer disposed on the substrate layer side of the second phosphorescent layer, wherein the blending ratio is 5.58 to 8.37%;
A guide light characterized by comprising: The guide light according to claim 3,
Each of the first phosphorescent layer, the second phosphorescent layer, and the third phosphorescent layer has a thickness of 45 to 50 μm,
A guide light characterized by.

Images